Sondex Limited
13Patents
7Active
13Granted
42Portfolio score
Filing activity: Mar 15, 2000 → Oct 11, 2011 · 5 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6868901B2 | Tubular cutting tool | Emerging Cross-Sectional Technologies | 35 | Expired |
| US7044219B2 | Shock absorber | Fixed Constructions | 33 | Expired |
| US7090007B2 | Centralizer for wireline tools | Fixed Constructions | 23 | Expired |
| US6842697B1 | Method for downhole logging | Physics | 13 | Expired |
| US8011448B2 | Rotary steerable tool | Fixed Constructions | 10 | Active |
| US6917303B2 | Logging sondes for use in boreholes | Electricity | 6 | Expired |
| US8693284B2 | Apparatus for creating pressure pulses in the fluid of a bore hole | Fixed Constructions | 5 | Active |
| US7591307B2 | Method of and system for determining the free point in a drill pipe | Fixed Constructions | 3 | Active |
| US6457357B1 | Fluid density measurement device | Physics | 2 | Expired |
| US8218133B2 | Refractive index tool and method | Emerging Cross-Sectional Technologies | 2 | Active |
| US9312798B2 | Sensor commuated electric motor with sensorless angular position determination and method | Electricity | 2 | Active |
| US8242436B2 | Neutron porosity logging tool using microstructured neutron detectors | Emerging Cross-Sectional Technologies | 0 | Active |
| US8375801B2 | Sensitive differential pressure sensor and method | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.